Lookup NU author(s): Dr Sharon Velasquez Orta
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
© 2018 Elsevier Ltd The removal of nutrients by Scenedesmus sp. in a high-rate algal pond, and subsequent algal separation by coagulation-flocculation or flotation with ozone to recover biomolecules, were evaluated. Cultivation of Scenedesmus sp. in wastewater resulted in complete NH3-H removal, plus 93% total nitrogen and 61% orthophosphate removals. Ozone-flotation obtained better water quality results than coagulation-flocculation for most parameters (NH3-N, NTK, nitrate and nitrite) except orthophosphate. Ozone-flotation, also produced the highest recovery of lipids, carbohydrates and proteins which were 0.32 ± 0.03, 0.33 ± 0.025 and 0.58 ± 0.014 mg/mg of biomass, respectively. In contrast, there was a low lipid extraction of 0.21 mg of lipids/mg of biomass and 0.12–0.23 mg of protein/mg of biomass in the coagulation-flocculation process. In terms of biomolecule recovery and water quality, ozone showed better results than coagulation-flocculation.
Author(s): Oliveira GA, Carissimi E, Monje-Ramirez I, Velasquez-Orta SB, Rodrigues RT, Ledesma MTO
Publication type: Article
Publication status: Published
Journal: Bioresource Technology
Print publication date: 01/07/2018
Online publication date: 17/03/2018
Acceptance date: 14/03/2018
ISSN (print): 0960-8524
ISSN (electronic): 1873-2976
Publisher: Elsevier Ltd
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